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authorGeert Uytterhoeven <geert+renesas@glider.be>2019-10-25 11:41:24 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-11-03 18:08:53 +0100
commitd3504757f3f049b553ba0eda8bd17cd1f2651285 (patch)
tree30f15df7508abc56187ead1a46305daf77ea4c3c /Documentation/filesystems
parent726ce477285dc77c824ea7273f2be9dd48ef1267 (diff)
debugfs: Add debugfs_create_xul() for hexadecimal unsigned long
The existing debugfs_create_ulong() function supports objects of type "unsigned long", which are 32-bit or 64-bit depending on the platform, in decimal form. To format objects in hexadecimal, various debugfs_create_x*() functions exist, but all of them take fixed-size types. Add a debugfs helper for "unsigned long" objects in hexadecimal format. This avoids the need for users to open-code the same, or introduce bugs when casting the value pointer to "u32 *" or "u64 *" to call debugfs_create_x{32,64}(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20191025094130.26033-2-geert+renesas@glider.be Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/debugfs.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/filesystems/debugfs.txt b/Documentation/filesystems/debugfs.txt
index 36dac49e859f..dc497b96fa4f 100644
--- a/Documentation/filesystems/debugfs.txt
+++ b/Documentation/filesystems/debugfs.txt
@@ -102,11 +102,14 @@ functions meant to help out in such special cases:
As might be expected, this function will create a debugfs file to represent
a variable of type size_t.
-Similarly, there is a helper for variables of type unsigned long:
+Similarly, there are helpers for variables of type unsigned long, in decimal
+and hexadecimal:
struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
struct dentry *parent,
unsigned long *value);
+ void debugfs_create_xul(const char *name, umode_t mode,
+ struct dentry *parent, unsigned long *value);
Boolean values can be placed in debugfs with: